강릉시 불화산 일대 뢰스 퇴적층의 지구화학적 특성
Geochemical properties of loess sediments around Mt. Bulhwa, Gangneung-si, Gangwon Province, South Korea
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초록
This study tried to reveal formative process, origin, and weathering properties of Quaternary unconsolidated sediments including loess sediments in Mt. Bulhwa, Gangneung-si, Gangwon Province, South Korea, using a geochemical approach. The section studied consisted downward of Unit I, Unit II and Unit III. Unit II and Unit III were subdivided into Unit II-1 and Unit II-2, and Unit III-1 and Unit III-2, respectively. Unit I indicated a geochemical similarity to the Korean loess as well as to the Chinese Loess Plateau, suggesting that Unit I is loess sediments sharing common origin with the Korean loess and Chinese Loess Plateau. However, a small amount of locally-driven materials was also included in Unit I. The geochemical properties of Unit II-1 and Unit II-2 were similar to Unit I and Unit III, respectively, indicating that Unit II is a mixture of loess sediments with local materials. While Unit III-2 was influenced by weathering materials from the granite and sedimentary rock around the section studied, mafic sources, such as alkali volcanics and basalt, contributed to Unit III-1.
Abstract
This study tried to reveal formative process, origin, and weathering properties of Quaternary unconsolidated sediments including loess sediments in Mt. Bulhwa, Gangneung-si, Gangwon Province, South Korea, using a geochemical approach. The section studied consisted downward of Unit I, Unit II and Unit III. Unit II and Unit III were subdivided into Unit II-1 and Unit II-2, and Unit III-1 and Unit III-2, respectively. Unit I indicated a geochemical similarity to the Korean loess as well as to the Chinese Loess Plateau, suggesting that Unit I is loess sediments sharing common origin with the Korean loess and Chinese Loess Plateau. However, a small amount of locally-driven materials was also included in Unit I. The geochemical properties of Unit II-1 and Unit II-2 were similar to Unit I and Unit III, respectively, indicating that Unit II is a mixture of loess sediments with local materials. While Unit III-2 was influenced by weathering materials from the granite and sedimentary rock around the section studied, mafic sources, such as alkali volcanics and basalt, contributed to Unit III-1.
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